/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 * <p/>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p/>
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.hive.jdbc;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

import org.apache.hadoop.hive.ql.hooks.ExecuteWithHookContext;
import org.apache.hadoop.hive.ql.hooks.HookContext;

/**
 * An ExecuteWithHookContext that stores HookContexts in memory and makes them available for reading
 */
public class ReadableHook implements ExecuteWithHookContext {

  private static List<HookContext> hookList = Collections.synchronizedList(new ArrayList<>());

  @Override
  public void run(HookContext hookContext) throws Exception {
    hookList.add(hookContext);
  }

  /**
   * @return the stored HookContexts.
   */
  public static List<HookContext> getHookList() {
    return hookList;
  }

  /**
   * Clear the stored HookContexts.
   */
  public static void clear() {
    hookList.clear();
  }
}
